Remove references to srv.nancy.grid5000.fr

data/grid5000/sites/nancy/servers/srv.json

-{
-  "kind": "physical",
-  "network_adapters": {
-    "bmc": {
-      "ip": "172.17.79.18",
-      "mac": "F0:1F:AF:E0:FA:DC",
-      "mounted": true
-    },
-    "default": {
-      "ip": "172.16.79.18",
-      "mac": "A0:36:9F:28:10:AC",
-      "mounted": true
-    }
-  },
-  "pdu": [
-    {
-      "port": 15,
-      "uid": "graoully-pdu1"
-    },
-    {
-      "port": 15,
-      "uid": "graoully-pdu2"
-    }
-  ],
-  "serial": "G8VYKZ1",
-  "type": "server",
-  "uid": "srv",
-  "warranty": "2020-11"
-}
\ No newline at end of file